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Mössbauer studies of structural properties and electrochemical characteristics of LiFePO4

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Abstract

The valency state and local coordination of Fe ions of four industrial samples and a sample of cathodic materials for recharcheable lithium ion batteries obtained using an original technology of St. Petersburg State Technological Institute (Technological University) were studied using the Mössbauer effect on the 57Fe isotope. It was found that the main valency state for more than 90% of iron ions was Fe2+. The values of isomer shift δ = 0.96–0.98 mm/s and quadrupole splitting σ = 2.88–2.93 mm/s for Fe2+ ions coincide with the values for compounds with the structure of olivine LiFePO4 and occupy positions in highly distorted FeO6 octahedrons. Fe3+ ions are in octahedral and/or tetrahedral local positions.

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Authors and Affiliations

  1. Ioffe Physical Technical Institute, Russian Academy of Sciences, St. Petersburg, Russia

    A. S. Kamzin, A. V. Bobyl’, E. M. Ershenko, E. I. Terukov, D. V. Agafonov & A. A. Valiullin

  2. St. Petersburg State Technological Institute (Technological University), Russia Kazan (Volga Region) Federal University, Kazan, Russia

    A. S. Kamzin, A. V. Bobyl’, E. M. Ershenko, E. I. Terukov, D. V. Agafonov & A. A. Valiullin

Authors
  1. A. S. Kamzin
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  2. A. V. Bobyl’
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  3. E. M. Ershenko
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  4. E. I. Terukov
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  5. D. V. Agafonov
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  6. A. A. Valiullin
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Correspondence to A. S. Kamzin.

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Original Russian Text © A.S. Kamzin, A.V. Bobyl’, E.M. Ershenko, E.I. Terukov, D.V. Agafonov, A.A. Valiullin, 2012, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2012, Vol. 38, No. 15, pp. 57–66.

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Kamzin, A.S., Bobyl’, A.V., Ershenko, E.M. et al. Mössbauer studies of structural properties and electrochemical characteristics of LiFePO4 . Tech. Phys. Lett. 38, 715–718 (2012). https://doi.org/10.1134/S1063785012080081

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  • DOI: https://doi.org/10.1134/S1063785012080081

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